feat: category icon badges on projects — CLI, App, Web, Plugin, SDK

Each project now shows a colored icon badge indicating its type:
- CLI (purple terminal), App (blue apple), Web (cyan globe)
- WebApp (teal app), Plugin (amber puzzle), SDK (violet package)
- Contrib (gray pull request)

internal/models/cv/cv.go

@@ -98,6 +98,7 @@ type Language struct {
 
 type Project struct {
 	Title            string   `json:"title"`
+	Category         string   `json:"category,omitempty"`         // Project type: cli, app, web, webapp, plugin, sdk, contrib
 	ProjectName      string   `json:"projectName,omitempty"`      // Optional: linkable part of title
 	ProjectDesc      string   `json:"projectDesc,omitempty"`      // Optional: non-linkable description part
 	ProjectID        string   `json:"projectID,omitempty"`        // Unique ID for scrolling/navigation